Hjördis "Disa" Eythorsdottir (born 24 July 1965) is an Iceland-born American bridge player. She is from Reykjavík.
Eythorsdottir was stripped of a silver medal at the 2002 world championships in Montreal for refusing to take a drug test covering substances banned by the IOC. This was during a period the World Bridge Federation wanted bridge to be a sport at the summer Olympic Games.
Eythorsdottir claims she was on a prescription diet drug connected with a back condition. She had asked if the drug was banned but she did not have a prescription certificate.